The Barker family left New Zealand for a 14-month tour of Europe, scheduling a string of accommodations that included several Airbnb stays. Fortunately, Mr. Barker is an IT specialist and understands there are constant forces at work trying to hack into anything that is remotely hackable. Like old settlers would set a perimeter around their campsite for the night, Mr. Barker ran a routine Wi-Fi network scan of the house his family had rented. The scan detected a hidden camera live streaming his family’s stay.